单项选择题
A.MCU
B.Application server
C.Gateway
D.Gatekeeper
单项选择题 WhatistheobjectiveofDiffie-Hellman？（）
单项选择题 WhichtypeofMACaddressisdynamicallylearnedbyaswitchportandthenaddedtotheswitch’srunningconfiguration？（）
单项选择题 AsanetworkengineeratCertpaper.com，youareresponsibleforCertpapernetwork.WhichwillbenecessarilytakenintoconsiderationwhenimplementingSyslogginginyournetwork？（）